Alterations in cramping, expulsions, and bleeding patterns may or may not be associated with cycle day of insertion but nonetheless could contribute to satisfaction with and continuation rates of the IUD. In a 60 month study of TCu380A IUDs in Iran, approximately 25% of women discontinued the method due to bleeding and pain (Jenabi 2006). Another study done in Kuwait found that irregular or heavy bleeding was a common complaint (Alnakash 2008). Published data on these issues is sparse. Without evidence that alternatives are safe for the two IUDs that are currently available, physicians may be reluctant to individualize.